Preparation, characterization and Cr(VI) adsorption evaluation of NaOH-activated carbon produced from Date Press Cake; an agro-industrial waste
| Autor: | Omid Rahmanian, Fazel Mohammadi-Moghadam, Mehdi Fazlzadeh, Babak Goudarzi, Vali Alipour, Samira Norouzi, Mohsen Heidari, Heshmatollah Nourmoradi, Kavoos Dindarloo |
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| Rok vydání: | 2018 |
| Předmět: |
Chromium
Environmental Engineering Industrial Waste Bioengineering 02 engineering and technology 010501 environmental sciences 01 natural sciences Industrial waste Adsorption Desorption Specific surface area medicine Press cake Waste Management and Disposal 0105 earth and related environmental sciences Renewable Energy Sustainability and the Environment Chemistry General Medicine Microporous material Hydrogen-Ion Concentration 021001 nanoscience & nanotechnology Carbon Kinetics Chemical engineering Chemisorption 0210 nano-technology Water Pollutants Chemical Activated carbon medicine.drug |
| Zdroj: | Bioresource Technology. 258:48-56 |
| ISSN: | 0960-8524 |
| DOI: | 10.1016/j.biortech.2018.02.106 |
| Popis: | Date Press Cake (DPC) is an inevitable by-product of date processing industries and may pose environmental problems if not managed properly. In this study, DPC was converted into activated carbon using solid NaOH under various activation conditions. The prepared activated carbon showed high specific surface area (2025.9 m2 g−1) and microporous texture (86.01%). It was successfully applied for the adsorption of Cr(VI) from aqueous solutions with maximum monolayer adsorption capacities as high as 282.8 mg g−1 (pH = 2) and 198.0 mg g−1 (pH = 5). The kinetic and isotherm experimental data of Cr(VI) adsorption onto the activated carbon were best described by Elovich and Redlich-Peterson models, respectively. It was found that the Cr(VI) adsorption onto the DPC-derived activated carbon was predominantly a chemisorption process with limited desorption rates (below 50%). Overall, Date Press Cake could be considered as an abundant and renewable agro-industrial precursor for the production of high quality activated carbon. |
| Databáze: | OpenAIRE |
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